Sprinkler



E. W. ROBERTS SPRINKLER Filed March 6. 1922 :FIZ: :2.4.1:

Patented Nov. 1, 1927.l

UNITED STATES PATENT oFFlcE.

EARL W. ROBERTS, OF DETROIT, MICHIGAN, ASSIGNOR T THE ROBERTS BRASS MANU- FACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

SPRINKLER.

Application led March 6, 1.922. Serial No. 541,303.

The invention relates to Sprinklers for use i in automatic sprinkler systems and has for tending its object the provision of al simple for-m of sprinkler in which the closure for the casing head is mounted upon the nozzle headband out of the path of the spray passing from the nozzle head. With this and other 0bjects in View, the invention residesI inthe novel features of construction as more fully vhereinafter set forth. Y l

In the drawings: Figure 1 yis a longitudinal section through a sprinkler embodying my inyention;

Figure 2 is a similar view showing the nozzle head with the closure for the casing head in extended position. l

1 is the casing head threadedly engaglng at its lower end the stand pipe 2 of the automatic sprinkler system. The upper end of the casing head is substantially flush with the ground, itpreferably extending but slightly thereabove. 3' Vis the nozzle head movable within the casing head 1 and adapted to extend outwardly through the opening 4 in the upper end of the latter, outward movement o the nozzle head being limited by means of the annular inwardly extending flange 5 at the upper end of the casing head engaging the outwardly exannual ange 6 at the lower end of the nozzle head. The nozzle head 3 is bellshaped and has at its upper end the dis- ,charge orifice 7 through which the water passes. 8 is a core secured within the nozzle head near its uppen end and provided with the inclined peripheral rooves 9 for effecting a whirling action o the water passing through the discharge orifice so that a conical spray is formed.

When the sprinkler is not in use, the

` nozzle head 3 occupies a position within the casing head 1, as shown in Figure 1, so that the sprinkler does not present an obstruction at an appreciable distance above the ground.

To close the open vupper end of the casing head 1 when the sprinkler is not in use, there is the closure disk 10 having the depending axial stem 11 passing through the discharge orifice of the nozzle head 3 and threadedly engaging the core 8. This closure disk is located a sufcient distance above the discharge orifice of the nozzle head that it will not interfere with the spray discharged from the nozzle head. Also, the

.to its axial location in said orifice.

- sure disk 10 is seated upon the upper, end of the casing head 1- and closes its opening, and the nozzle head 3 is housed within the casing head and suspended from the closure disk through its depending stem 11 and the core 8. Upon opening the valve controlling the supply of water to the stand pipe 2, this water upon rising into the casing head 1 raises the bell-shaped nozzle head 3 and with it the closure disk 10 until the annular flanges 5 and 6 upon the casing head and nozzle head respectively engage, after which the water passes through the nozzle head only, the inclined grooves of the core produclng a whirling action so that the water upon passing through the discharge orifice has the form of a conical spray. The closure disk is located sufiiciently above the discharge orifice that it will not interfere with the spray, nor does its depending stem, due Upon closing thevalve controlling the supply of water to the stand pipe, the nozzle head with the closure disk will lower owing to gravity until the closure disk is again seated upon'the upper end of the casing head.

What I claim as my invention is:

1.. The combination with a casing head having an opening in its u per end, of a nozzle head movable vertical y within said casing head and adapted to engage in said opening, a discharge orifice in the upper end of said nozzle head, a member within said nozzle head for effecting a whirling action of the liquid through said discharge orifice, and a closure for said opening in said casing head comprising a disk located sufliciently above said discharge orifice to be out of the path 'of the liquid flowing therethrough, and a depending stem extending axially through said discharge orifice and carried upon said member. i

2. The combination with a casing head having an opening therein, of a nozzle head movable through said opening having a discharge orifice adapted to form a conical spray, a member extending axially through said discharge orifice and secured to said nozzle head, and a closure for said opening secured to the upper end of said member out of the path of the said conical spray.

3. The combination With a casin head having an opening in its upper en of a nozzle head movable vertically within said casing head and adapted to engage in said opening, a discharge orice in the upper end of said nozzle head, means within said nozzle head for effecting a whirling action of the liquid through said discharge orifice, and a closure for said opening in said casing head comprising a disk located sufficiently above said discharge orifice to be out of the path of the liquid flowing therethrough, and a depending stem extending axially through said disciarge orice and carried upon said nozzle hea 4. The combination With a casing head having an opening in its upper end, of a nozzle head telescopically engaging said casing charge orifice, a closure for the opening l-said casing head arranged out of the path of head and provided with a discharge orifice i adapted to form a conical spray, means within said nozzle head for efecting a whirling motion of the liquid through said dissaid conical spray, said closure having a depending portion extending vaxially through said discharge orice and secured to said nozzle head; and anges on said casing head and nozzle head to limit the upward movement of said nozzle head yand closure.

5. The combination with a casing head having an opening therein, of a nozzle head movable through said opening and provided With a discharge orice, means Within said nozzle head for effecting a whirling action of the liquid through said discharge orifice, and a closure for said opening in said Casin 0 head arranged out of the path of the liquid ow through said discharge orifice, said closure having a depending portion extending axially through said discharge orifice and secured to said nozzle head.

In testimony whereof I aiiix my signature.

EARL W. ROBERTS. 

